Recommend you visit European Maison de Photographie, on line 7, across Ile de la Cite from Notre Dame, if you are a Teacher of any kind, take some ID with a date on it, the Musee D'Orsay is free and you do not have to wait in line, as is the Orangerie, and Pantheon (great view, and famous folks buried) and many things are discounted for teachers. An ITIC, (International Teachers ID) card lets you also buy cheap and one way tickets for travel at any of about six offices.
Been a while, but I used to visit often and stay about a month, for classic equipment, better to sell in Paris than buy. ;-) Still, Maison du Leica, and the others near Bastille are a lot of fun. There is a Nikon shop with a whole wall of the owner's collection. Hoping they are all still there.
45 Quai des Grands Augustins -- Cote Seine, have been going there since they opened, legit menu, reasonable, and really quite good, the menu really includes everything.
Recommend the wing of sting ray, and all the deserts. Kir Royal, house wine and coffee were all included with the entrees, on the left bank between Pont Neuf and Notre Dame.
I liked shooting along the river near Ile de la Cite, the old guys fishing, some pretty ladies, and the markets that open once or twice a week. Luxembourg gardens are nice, near Odeon in the 6th close to the 5th arr.
Crepes on the street, (wear an old shirt, some is going to drip).
Churches, La Chapelle, bring the widest lens you have, and St. Denis, said to be the first Gothic Cathedral, up in the north. St. Sulpice in the 6th, not ornate, but quiet and interesting light, plus the great streets in the area.
Wine, any Margeaux or St. Julien.
I would avoid the areas around the Gare du Nord and l'Est, at least at night.
Try to sample all the cheeses, only about 300, ;-)
A city for good legs.
Please excuse my spellings, it has been a while, and I really never wrote much in French.
People were almost universally nice to me, the only rude French I met all work at the airports, seems to be required there, but the French have a dry sense of humor I find, and often they are dead pan in joking and people mistake it for attitude, OTOH, at the airport, they are openly rude, unless all those guys retired by now.
Regards, John